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Summary: Ctors | Methods | Inherited Methods

# FingerprintManager.AuthenticationCallback

`public static abstract class FingerprintManager.AuthenticationCallback`
`extends Object` ``

java.lang.Object
↳ | android.hardware.fingerprint.FingerprintManager.AuthenticationCallback

This class is deprecated.
See `BiometricPrompt.AuthenticationCallback`

Callback structure provided to `FingerprintManager#authenticate(CryptoObject, CancellationSignal, int, AuthenticationCallback, Handler)`. Users of `FingerprintManager#authenticate(CryptoObject, CancellationSignal, int, AuthenticationCallback, Handler)` must provide an implementation of this for listening to fingerprint events.

## Summary

### Public constructors
`AuthenticationCallback()`

### Public methods
`void` | `onAuthenticationError(int errorCode, CharSequence errString)` Called when an unrecoverable error has been encountered and the operation is complete.
`void` | `onAuthenticationFailed()` Called when a fingerprint is valid but not recognized.
`void` | `onAuthenticationHelp(int helpCode, CharSequence helpString)` Called when a recoverable error has been encountered during authentication.
`void` | `onAuthenticationSucceeded(FingerprintManager.AuthenticationResult result)` Called when a fingerprint is recognized.

### Inherited methods
From class `java.lang.Object`
`Object` | `clone()` Creates and returns a copy of this object.
`boolean` | `equals(Object obj)` Indicates whether some other object is "equal to" this one.
`void` | `finalize()` Called by the garbage collector on an object when garbage collection determines that there are no more references to the object.
`final Class<?>` | `getClass()` Returns the runtime class of this `Object`.
`int` | `hashCode()` Returns a hash code value for the object.
`final void` | `notify()` Wakes up a single thread that is waiting on this object's monitor.
`final void` | `notifyAll()` Wakes up all threads that are waiting on this object's monitor.
`String` | `toString()` Returns a string representation of the object.
`final void` | `wait(long timeout, int nanos)` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object, or some other thread interrupts the current thread, or a certain amount of real time has elapsed.
`final void` | `wait(long timeout)` Causes the current thread to wait until either another thread invokes the `notify()` method or the `notifyAll()` method for this object, or a specified amount of time has elapsed.
`final void` | `wait()` Causes the current thread to wait until another thread invokes the `notify()` method or the `notifyAll()` method for this object.

## Public constructors

### AuthenticationCallback

    public AuthenticationCallback ()

## Public methods

### onAuthenticationError

    public void onAuthenticationError (int errorCode,
                    CharSequence errString)

Called when an unrecoverable error has been encountered and the operation is complete. No further callbacks will be made on this object.

Parameters
`errorCode` | `int`: An integer identifying the error message
`errString` | `CharSequence`: A human-readable error string that can be shown in UI

### onAuthenticationFailed

    public void onAuthenticationFailed ()

Called when a fingerprint is valid but not recognized.

### onAuthenticationHelp

    public void onAuthenticationHelp (int helpCode,
                    CharSequence helpString)

Called when a recoverable error has been encountered during authentication. The help string is provided to give the user guidance for what went wrong, such as "Sensor dirty, please clean it."

Parameters
`helpCode` | `int`: An integer identifying the error message
`helpString` | `CharSequence`: A human-readable string that can be shown in UI

### onAuthenticationSucceeded

    public void onAuthenticationSucceeded (FingerprintManager.AuthenticationResult result)

Called when a fingerprint is recognized.

Parameters
`result` | `FingerprintManager.AuthenticationResult`: An object containing authentication-related data

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